A comprehensive preview, including betting odds and predictions, for the MLB game between the Cincinnati Reds and the Arizona Diamondbacks on Aug. 21, 2026.

The Arizona Diamondbacks have signed a former All-Star infielder from the Toronto Blue Jays . According to an announcement from Arizona's Triple-A affiliate, the Reno Aces, the NL West club has signed Santiago Espinal to a minor-league contract.

Diamondbacks manager Torey Lovullo did not want to disclose many specifics about his meeting with Ketel Marte, Marte’s agent Charisse Espinosa-Dash and general manager Mike Hazen on Thursday, but he slightly peeled back the curtain on this bizarre chapter in Arizona.

Our Diamondbacks vs. Red Sox predictions and MLB picks see value in backing Payton Tolle to lead Boston to a low-event win on Aug. 19.

Geraldo Perdomo and Gabriel Moreno had back-to-back RBI singles off Erik Sabrowski in a four-run eighth inning, lifting the Arizona Diamondbacks to a 4-1 victory over the Cleveland Guardians.

The Arizona Diamondbacks have done well over the last few years in adding homegrown talent. During the 2026 MLB Draft, the club added more upside, headlined by former Arkansas standout catcher Ryder Helfrick.

The San Diego Padres and Arizona Diamondbacks are shockingly similar teams, so does anyone have an edge in the NL Wild Card race?

MLB postseason standings 2026: Major League Baseball division standings, wild-card standings for MLB playoffs picture before baseball games today.

The Arizona Diamondbacks (67-61), with Eduardo Rodriguez on the hill, host the Cincinnati Reds (61-67) who will counter with Nick Lodolo, at 9:40 p.m. ET on Friday in a series opener. The article below will give you everything you need to know to watch Arizona play Cincinnati.